The United Nations Navy (UNN) is the naval branch of the military of the United Nations. It is considered less technologically advanced than its Martian counterpart, the Martian Congressional Republic Navy, but has the largest fleet in Sol system and is overall superior.
The UNN is commanded by the Admirals, which, in turn, are the subordinates of the Secretary-General.
|UNN Agatha King||Truman Class||Dreadnought||Books||UN Flagship carrying Admiral Nguyen over Jovian moon Io.|
|UNN Okimbo||Truman Class||Dreadnought||Books||UN Jupiter Fleet Flagship carrying Admiral Souther over Jovian moon Io|
|UNN Thomas Prince||Xerxes Class||Battleship||Books||Carried various religious clergy and artists into the Ring|
|UNN Nathan Hale||unknown battleship class||Battleship||TV||Sent by the UN to arrest Fred Johnson on Tycho Station. Raced the MCRN Scirocco to Phoebe until the MCRN vessel having a smaller Marine complement destroyed the station.|
|UNN Seung Un||unknown destroyer class||Destroyer||Books||Sabotaged outside The Ring in plot to discredit James Holden|
|UNN Munroe||Munroe Class||Light Destroyer||Books|
|UNN Wu Tsao||unknown frigate class||Frigate||Books||Part of fleet Admiral Nguyen had sent to Ganymede but which Avasarala disbanded|
|UNN Ravi||unknown corvette class||Corvette||Books|
|UNN Dagmar||Unknown Class||Unknown||Books|
|UNN Macedon||Unknown Class||Unknown||Books|
|UNN Darius||Unknown Class||Unknown||Books|
|UNN Greenville||Unknown Class||Unknown||Books|
|UNN Tanaka||Unknown Class||Unknown||Books|
|UNN Dyson||Unknown Class||Unknown||Books|
|UNN Kennedy||Unknown Class||Unknown||Books|
|UNN Zhang Fei (Books)|
Zheng Fei (TV)
|Unknown Class||Unknown||Books and TV||James Holden had been posted aboard this vessel when he was discharged|
|UNN Triton||Unknown Class||Unknown||Books|
|UNS Arboghast||civilian research vessel||Unknown||Books and TV||Commandeered by the UNN to investigate the Eros crash site on Venus.|
When the Donnager is destroyed by what is believed to be OPA ships, and Mars declares war on the Belt, the the UN stays neutral. Later when Holden released information on the ships that destroyed the Donnager were actually made on Earth, UNN ships fired on Martian Congressional Republic Navy ships in Mars' orbit and destroyed the Deimos deep radar station. After securing Martian space, the UNN begin laying siege to Mars, forcing, the MCRN then orders nearly all their ships in the system to return to Mars and declares war on Earth. The Belt claims it a victory, and the siege lasts for months. However, all combat remains in orbit and doesn't spread onto Martian soil.
The Charles Lyell, a science vessel, escorted by the Ravi, was doing a non-Belt asteroid mapping when it was diverted to Eros to collect samples of the Protomolecule. It was in a confrontation with the Rocinante until they finally worked together to stop the asteroid.
The Ganymede incident was an event where a human-protomolecule hybrid attacked Martian and UN Marines on Ganymede, killing everyone except Gunnery Sergeant Roberta Draper. The initial attack was misinterpreted by both the MCR and the UN as an attack from the other side, which lead to a battle above and on Ganymede that claimed nearly three thousand military and civilian lives, as well as over five billion MCR dollars of infrastructure damage.
- ↑ The TV adaptation referred to James Holden's ship with a similar but distinct name. It is unknown whether that was intentional or a goof.